CN219626421U - Current control type magnetic valve type flexible inductor, transformer and LLC resonant converter - Google Patents
Current control type magnetic valve type flexible inductor, transformer and LLC resonant converter Download PDFInfo
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Abstract
A current control type magnetic valve type flexible inductor is composed of an EE-shaped iron core, two direct current control coils and an alternating current coil; two magnetic valves are formed on two side posts of the EE iron core, and an air gap is formed on a middle post of the EE iron core; the two direct current control coils are respectively wound on two side posts of the EE-shaped iron core, and the alternating current coil is wound on a middle post of the EE-shaped iron core; the two direct current control coils are connected in series and control current through direct current; the magnitude of the direct current control current is regulated, so that the magnetic saturation degree of the two magnetic valves can be changed, and the ultra-wide range regulation of the inductance of the alternating current coil is realized. The beneficial effects of the utility model are as follows: the flexible inductor has the advantages of small number of turns of the direct-current control coil, small current, large inductance adjustment range of the alternating-current coil and the like, is used for the LLC resonant converter, and can realize the ultra-wide input and output voltage range and ultra-wide load range adjustment of the converter and the current sharing control of the multi-path parallel converter.
Description
Technical Field
The utility model relates to the field of power electronic converters, in particular to a current control type magnetic valve type flexible resonant inductor and a flexible resonant transformer for a power electronic LLC resonant converter.
Background
In recent years, switching power supplies for supplying electric energy to various electric devices are being developed toward low voltage, large current, small volume, light weight, high efficiency, thinness and integration, including voltage regulation modules for supplying precise power to high-precision and high-speed microprocessors such as central processing units (Central Processing Unit, CPUs) and digital signal processors (Digital Signal Processing, DSPs) of computers, and switching power supplies which have been recently raised and widely used in the fields of large data centers, electric automobiles, hybrid vehicles, uninterruptible power supplies, electric energy quality regulation power supplies, aviation power supplies, new energy power generation, superconducting energy storage and the like, and these switching power supplies have been widely used in the fields of LLC resonant converters, in particular, by adopting the topology structures of resonant converters such as LLC resonant converters and LCC resonant converters, so that these resonant converters can realize zero-voltage turn-on (ZVS) of primary side switching tubes and zero-current turn-off (ZCS) of secondary side switching tubes of transformers, and have the advantages of low loss, low switching stress, high efficiency, high power density and the like.
The conventional LLC resonant converter faces two main problems: firstly, the LLC resonant converter adopts variable frequency control to regulate output voltage and load, but when the input voltage range, the output voltage range and the load variation range are wider, the switching frequency variation range of the LLC resonant converter is also widened, so that the resonant inductor and the resonant transformer are difficult to optimally design; secondly, in order to expand the capacity, LLC resonant converters often need to operate in multiple phases in parallel, but due to the tolerance (inductance tolerance±5%, capacitance tolerance±5%) of the resonant elements of each parallel phase, the resonant current and the rectified output current of each parallel phase are unbalanced, and the circuit may be damaged in severe cases.
In order to solve the two problems, a variable inductor and a variable transformer are researched, however, the sectional areas of iron core side posts of the traditional variable inductor and the traditional variable transformer are kept unchanged, the iron core side posts need a large direct current ampere-turns to enter a transition region of a magnetic material, the resonant inductance value is adjusted, the number of turns of a direct current control winding is large, the current is large, the volumes of the variable inductor and the variable transformer are large, the cost is high, the loss is large, and the adjustment range of the inductance value is narrow.
Disclosure of Invention
The utility model aims to overcome the defects of the technology and provide a current control type magnetic valve flexible inductor and a flexible transformer, which are used for resonant converters such as LLC resonant converters, LCC resonant converters and the like, and the current sharing control of the LLC resonant converters is realized by changing the direct current control current of the current control type magnetic valve flexible inductor and the flexible transformer and realizing the ultra-wide range adjustment of the inductance value of the flexible inductor and the excitation inductance value of the flexible resonant transformer, thereby realizing the ultra-wide input and output voltage range and the ultra-wide load change range of the LLC resonant converters and the current sharing control of the multi-channel parallel LLC resonant converters.
The technical scheme adopted for solving the technical problems is as follows:
a current control type magnetic valve type flexible inductor is composed of two E-shaped iron cores, two direct current control coils and an alternating current coil; the sectional areas of the end parts of the two side posts of the E-shaped iron core are smaller than the sectional areas of other parts of the side posts, the end parts of the two side posts are equal in length, and the center post of the two E-shaped iron cores is shorter than the side posts; all magnetic columns of the two E-shaped iron cores are oppositely placed in front of each other to form an EE-shaped iron core, and two magnetic valves of the EE-shaped iron core are respectively formed by four side column ends of the EE-shaped iron core, which are oppositely placed in pairs in front of each other; because the middle columns of the 'EE' iron core are shorter than the side columns, an air gap is formed between the two middle columns of the 'EE' iron core; the two direct current control coils are respectively wound on four side posts which are oppositely arranged on the front faces of the EE-shaped iron core, and the alternating current coils are wound on a center post of the EE-shaped iron core; the two direct current control coils are connected in series, direct current control voltage is applied to generate direct current control current, and direct current magnetic fluxes are generated in four side posts and two magnetic yokes of the EE-shaped iron core; alternating current is passed through the alternating current coil, alternating current magnetic flux is generated in the center column of the EE-shaped iron core, the alternating current magnetic flux is divided into two parts, and the two parts pass through four side columns of the EE-shaped iron core, which are oppositely arranged in pairs; and regulating the direct current control voltage to change the direct current control current and control the magnetic saturation degree of the two magnetic valves, so that the ultra-wide range regulation of the inductance of the alternating current coil is realized.
The beneficial effects of the utility model are as follows: the current control type magnetic valve type flexible inductor provided by the utility model has the advantages of small number of turns of a direct current control coil, small direct current control current, large inductance adjustment range of an alternating current coil and the like, can be used for various types of resonant converters such as LLC resonant converters, LCC resonant converters and the like, and can realize the adjustment of ultra-wide input and output voltage ranges and ultra-wide load change ranges of the resonant converters and the current sharing control of the multipath parallel resonant converters.
The following description is made in detail by way of example with reference to the accompanying drawings.
Drawings
Fig. 1 is a front view of a rectangular magnetic valve type "EE" shaped iron core.
Fig. 2 is a front view of the structure of a current-controlled rectangular magnetic valve type flexible inductor of fig. 1.
Fig. 3 is a front view of the structure of a current control type rectangular magnetic valve type flexible transformer according to the second embodiment of fig. 2.
Fig. 4 is a front view of the structure of a two-stage rectangular magnetic valve type "EE" shaped core of the third embodiment of fig. 1.
Fig. 5 is a front view of the structure of a trapezoidal magnetic valve type "EE" shaped iron core of the fourth embodiment of fig. 1.
Fig. 6 is a front view of the structure of a trapezoidal + rectangular magnetic valve type "EE" shaped core of the fifth embodiment of fig. 1.
Fig. 7 is a front view of the structure of a quarter-arc + rectangular magnetic valve type "EE" shaped core of the sixth embodiment of fig. 1.
Fig. 8 is a front view of the structure of a rectangular magnetic valve type "EE" shaped iron core of the seventh embodiment of fig. 1.
Fig. 9 is a front view of the structure of a current-controlled rectangular magnetic valve type flexible inductor of the seventh embodiment of fig. 8 and 2.
Fig. 10 is a front view of the structure of a current control type rectangular magnetic valve type flexible transformer of the eighth embodiment of fig. 9.
Fig. 11 is a circuit topology diagram of an LLC resonant converter based on a current-controlled magnetic valve type flexible inductor of embodiment nine of fig. 2.
Fig. 12 is a circuit topology diagram of an LLC resonant converter based on a current controlled magnetic valve type flexible transformer of the tenth embodiment of fig. 3.
In the figure, a 1- "E" -shaped iron core; outside magnetic column of 2- "E" shape iron core; center pillar of 3- "E" shape iron core; a magnetic yoke of the 4- 'E' -shaped iron core 1; an air gap between the middle columns 3 of the 5-two E-shaped iron cores 1, and the rectangular small-section-area end parts of the outer magnetic columns 2 of the 2-1-E-shaped iron cores 1; the main body part of the outer magnetic column 2 of the 2-2- 'E' -shaped iron core 1; the sectional area of the outer magnetic column 2 of the A- 'E' -shaped iron core 1; a is that 1 Cross-sectional area of rectangular end 2-1 of outer leg 2 of "E" shaped core 1, a 1 Less than A; d-length of end 2-1; 6-the EE-shaped iron core is formed by two E-shaped iron cores 1, the front faces of the center posts 3 of the two E-shaped iron cores 1 are oppositely arranged to form an iron core center post of the EE-shaped iron core, the front faces of the side post end parts 2-1 of the two E-shaped iron cores 1 are oppositely arranged to form a cross section with the length of 2d and the sectional area of A 1 Is a rectangular magnetic valve; 6-1, 6-2-reducing the cross-sectional area of the middle part of the rectangular magnetic valve 6, wherein the part with the non-reduced cross-sectional area is called a first-stage rectangular magnetic valve, and the part with the reduced cross-sectional area is called a second-stage rectangular magnetic valve; n (N) dc1 、N dc2 Two dc control coils wound around the outer magnetic poles 2 of the "EE" shaped core, respectively, in pairs; n (N) ac1 、N ac2 Two ac coils wound on two oppositely placed center poles 3 of the "EE" shaped core; i dc In two series-connected DC control coils N dc1 、N dc2 The direct current passing through the transformer is used for controlling current; phi dc -direct current control current I dc The direct current magnetic flux is generated in the outer magnetic columns 2 which are arranged in pairs in the four of the EE-shaped iron cores; i.e ac1 -in ac coil N ac1 An alternating current passing through the circuit; phi ac -alternating current i ac1 Alternating magnetic flux generated in the center leg 3 of the "EE" shaped core; phi ac1 、Φ ac2 -alternating magnetic flux Φ ac Are arranged in pairs in four of the EE-shaped iron coresIs divided into two parts in the side column 2; l (L) ac1 、L ac1 -an ac coil N ac1 、N ac2 Is a combination of the inductance of the capacitor; i.e ac2 -alternating magnetic flux Φ ac In the AC coil N ac2 An ac current induced in the medium; v (V) in 、V o -a dc input voltage, a detected output dc voltage of the LLC resonant converter; q (Q) 1 、Q 2 、Q 3 、Q 4 -a power electronic switching device on the primary side of the LLC resonant converter; l (L) r -resonant inductance of the LLC resonant converter; n (N) r -resonant inductance L r Is a winding of (a); c (C) r -a resonant capacitance of the LLC resonant converter; t (T) r -a resonant transformer of the LLC resonant converter; n (N) p 、N s Primary and secondary windings of the resonant transformer Tr; l (L) m Primary coil N p Is a magnetic field inductance of (a); a secondary side rectifying circuit of the D-LLC resonant converter; c (C) o -a dc output filter capacitance of the LLC resonant converter; r is R L -load resistance of the LLC resonant converter; v (V) ref -a given dc voltage of the LLC resonant converter control system; given DC voltage V of DeltaV-LLC resonant converter control system ref And output DC voltage V o Deviation of the feedback value; PI-proportional integral regulator; i.e r -through the resonant inductance L r Primary side resonant current of the transformer; i D -transformer secondary side rectifying current.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, it will be appreciated by those skilled in the art that the present utility model may be practiced without such specific details.
Embodiment one:
referring to fig. 1 and 2, a current control type magnetic valve flexible inductor is composed of two E-shaped iron cores 1 and two DC control coils N dc1 、N dc2 And an alternating current coil N ac1 Constructing; two side posts of the E-shaped iron core 1Cross-sectional area A of end 2-1 of 2 1 Smaller than the sectional area A of the main body part 2-2 of the side post 2, the length of the end part 2-1 of the side post 2 is d, and the center post 3 of the two E-shaped iron cores 1 is shorter than the side post 2; all the magnetic columns of the two E-shaped iron cores 2 are oppositely placed in front respectively to form an EE-shaped iron core, and the end parts 2-1 of four side columns 2 oppositely placed in front of the EE-shaped iron core respectively form the EE-shaped iron core with the length of 2d and the sectional area of A 1 Is provided with two rectangular magnetic valves 6; since the center leg 3 of the "EE" core is shorter than the side legs 2, an air gap 5 is formed between the two center legs 3 of the "EE" core; the two direct current control coils N dc1 、N dc2 Respectively wound on four side posts 2 which are oppositely arranged on the front sides of the EE-shaped iron core, and the alternating current coil N ac1 Around the center leg 3 of the "EE" -shaped core; the two direct current control coils N dc1 、N dc2 In series and apply a DC control voltage V dc To generate DC control current I dc Generating a direct magnetic flux Φ in the four legs 2 and two yokes 4 of the "EE" shaped core dc The method comprises the steps of carrying out a first treatment on the surface of the At the alternating current coil N ac1 Through alternating current i ac1 Generating an alternating magnetic flux Φ in the leg of the "EE" core ac The alternating magnetic flux phi ac One is divided into two parts: phi ac1 And phi is ac2 The side posts 2 are oppositely arranged on the front sides of the four pairs of the EE-shaped iron cores respectively; regulating the DC control voltage V dc To change the magnitude of the direct current control current I dc Can control the magnetic saturation degree of the two rectangular magnetic valves 6, thereby realizing the alternating current coil N ac1 Inductance L of (2) ac1 Is provided.
Embodiment two:
referring to fig. 3, a current control type magnetic valve type flexible transformer, an ac coil N as described in embodiment 1 ac1 As a primary winding of the flexible transformer; an alternating current coil N is added on a center leg 3 of the EE-shaped iron core in the embodiment 1 ac2 As a secondary winding of the flexible transformer; at the primary winding N ac1 An alternating voltage is applied to the input end of the capacitor to generate a primary alternating current i ac1 Generating ac flux Φ in the leg 3 of the "EE" core ac1 The alternating magnetic flux phi ac1 At the secondary winding N ac2 Generating induced potential on the primary side and outputting secondary side alternating current i ac2 The method comprises the steps of carrying out a first treatment on the surface of the The alternating magnetic flux phi ac1 One is divided into two parts: phi ac1 、Φ ac2 Four side posts 2 which are respectively arranged in pairs through the EE-shaped iron cores; regulating the DC control voltage V dc To change the magnitude of the direct current control current I dc Can control the magnetic saturation degree of two rectangular magnetic valves 6, thereby realizing the primary winding N of the flexible transformer ac1 Exciting inductance L of (2) ac1 Is provided.
Embodiment III:
referring to fig. 4, a current control type magnetic valve flexible inductor is described in embodiment 1 with a cross-sectional area of a 1 Is changed into a two-stage rectangular magnetic valve, wherein the sectional area A of the second-stage magnetic valve 6-2 2 A cross section A smaller than the first-stage magnetic valve 6-1 1 The method comprises the steps of carrying out a first treatment on the surface of the The dc control coil and ac coil of the current control type magnetic valve flexible inductor in this embodiment are the same as those described in fig. 2. In addition, referring to embodiment 2, the current control type magnetic valve type flexible inductor of the present embodiment may be changed to a current control type magnetic valve type flexible transformer.
Embodiment four:
referring to fig. 5, a current control type magnetic valve flexible inductor is provided, wherein the rectangular magnetic valve 6 described in embodiment 1 is changed to a double trapezoid magnetic valve 6-3; the alternating and straight coils of the current control type magnetic valve type flexible inductor in this embodiment are the same as those described in fig. 2. In addition, referring to embodiment 2, the current control type magnetic valve type flexible inductor of the present embodiment may be changed to a current control type magnetic valve type flexible transformer.
Fifth embodiment:
referring to fig. 6, a current control type magnetic valve flexible inductor is provided, wherein the double trapezoid magnetic valve 6-3 in the embodiment 4 is changed into a double trapezoid+rectangular magnetic valve 6-4; the alternating and straight coils of the current control type magnetic valve type flexible inductor in this embodiment are the same as those described in fig. 2. In addition, referring to embodiment 2, the current control type magnetic valve type flexible inductor of the present embodiment may be changed to a current control type magnetic valve type flexible transformer.
Example six:
referring to fig. 7, a current control type magnetic valve flexible inductor is provided, in which the rectangular magnetic valve 6 in embodiment 1 is changed into a double quarter arc shape+rectangular magnetic valve 6-5, the radius of the quarter arc is R, the width of the rectangle is W, and the height of the rectangle is 2d; the alternating and straight coils of the current control type magnetic valve type flexible inductor in this embodiment are the same as those described in fig. 2. In addition, referring to embodiment 2, the current control type magnetic valve type flexible inductor of the present embodiment may be changed to a current control type magnetic valve type flexible transformer.
Embodiment seven:
referring to fig. 8 and 9, a current control type magnetic valve type flexible inductor, the positions of the side posts 2 with the magnetic valve 6 of the EE-shaped iron core described in the embodiment 1, in which the two front faces are oppositely placed, and the positions of the middle posts 3 in which the two front faces are oppositely placed are interchanged. In addition, the positions of the side posts 2 and the center posts 3, which are disposed opposite to each other on the two front sides of the "EE" shaped iron cores described in embodiments 3 to 6, may be interchanged.
Example eight:
referring to fig. 10, a current control type magnetic valve type flexible transformer, the positions of the side posts 2 with the magnetic valve 6 of the "EE" shaped iron core of the embodiment 2, in which two front faces are oppositely placed, and the positions of the center posts 3 in which two front faces are oppositely placed are interchanged. In addition, the positions of the side posts 2 and the center posts 3, which are disposed opposite to each other on the two front sides of the "EE" shaped iron cores described in embodiments 3 to 6, may be interchanged.
Example nine:
referring to fig. 11, an LLC resonant converter based on a current-controlled magnetic valve type flexible inductor according to embodiment 1 is used as a resonant inductance L of the LLC resonant converter r The method comprises the steps of carrying out a first treatment on the surface of the A given DC voltage V in the control system of the LLC resonant converter ref And output DC voltage V o The deviation DeltaV of (a) is regulated by PI (proportional integral) to obtain a direct current control voltage V con Obtaining a direct current control current I through a voltage control current source dc DC control coil N for current control type magnetic valve flexible inductor dc1 And N dc2 Resonant inductance L for realizing LLC resonant converter r Ultra-wide range regulation of LLC resonant converter thereby achieving an input voltage V in Output voltage V o And a load resistor R L Ultra-wide variation range adjustment of the transformer primary side resonance current and secondary side rectification current of the multi-path parallel LLC resonant converter.
Example ten:
referring to fig. 12, an LLC resonant converter based on a current-controlled magnetic valve type flexible transformer, which is described in embodiment 2, is used as a resonant transformer T of the LLC resonant converter r The method comprises the steps of carrying out a first treatment on the surface of the A given DC voltage V in the control system of the LLC resonant converter ref And output DC voltage V o The deviation DeltaV of (a) is regulated by PI (proportional integral) to obtain a direct current control voltage V con Obtaining a direct current control current I through a voltage control current source dc DC control coil N of current control type magnetic valve flexible transformer dc1 And N dc2 Resonant transformer T for realizing LLC resonant converter r Exciting inductance L of (1) m Ultra-wide range regulation of LLC resonant converter thereby achieving an input voltage V in Output voltage V o And a load resistor R L Ultra-wide variation range adjustment of (c).
Finally, it should be noted that: the above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model. The foregoing description of the principles and embodiments of the utility model has been presented in its embodiments, but is provided to facilitate the understanding of the principles and embodiments of the utility model; also, those skilled in the art will appreciate that the conception upon which this disclosure is based may readily be utilized as a basis for the designing of other structures for carrying out the several purposes of the present utility model. The description is thus not to be taken as limiting the utility model, but is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. A current control type magnetic valve type flexible inductor is composed of two E-shaped iron cores, two direct current control coils and an alternating current coil, and is characterized in that: the sectional areas of the end parts of the two side posts of the E-shaped iron core are smaller than the sectional areas of other parts of the side posts, the end parts of the two side posts are equal in length, and the center post of the two E-shaped iron cores is shorter than the side posts; all the magnetic columns of the two E-shaped iron cores are oppositely placed in front of each other to form an EE-shaped iron core, and the end parts of the four side columns of the EE-shaped iron core, which are oppositely placed in pairs, form two magnetic valves of the EE-shaped iron core respectively; since the center leg of the "EE" shaped core is shorter than the side legs, an air gap is formed between the two center legs of the "EE" shaped core; the two direct current control coils are respectively wound on side posts which are oppositely arranged on the four front sides of the EE-shaped iron core, and the alternating current coils are wound on middle posts which are oppositely arranged on the two front sides of the EE-shaped iron core; the two direct current control coils are connected in series, direct current control voltage is applied to generate direct current control current, and direct current magnetic fluxes are generated in four side posts and two magnetic yokes of the EE-shaped iron core; alternating current is passed through the alternating current coil, alternating current magnetic flux is generated in the center column of the EE-shaped iron core, the alternating current magnetic flux is divided into two parts, and the two parts pass through four side columns of the EE-shaped iron core, which are oppositely arranged in pairs; the magnitude of the direct current control voltage is regulated to change the magnitude of the direct current control current, and the magnetic saturation degree of the two magnetic valves can be controlled, so that the ultra-wide range regulation of the inductance of the alternating current coil is realized.
2. A current-controlled magnetic valve flexible inductor according to claim 1, characterized in that: adding an alternating current coil on a center post of an EE-shaped iron core to form a current control type magnetic valve type flexible transformer, wherein the alternating current coil of the flexible inductor in claim 1 is used as a primary winding of the flexible transformer, and the added alternating current coil is used as a secondary winding of the flexible transformer; applying a primary alternating voltage to an input end of the primary winding to generate a primary alternating current, generating a primary alternating magnetic flux in a core center post of the EE-shaped core, generating an induced potential on the secondary winding, and outputting a secondary alternating current; the primary side alternating current magnetic flux is divided into two parts, and the two parts pass through four side posts of the EE-shaped iron core which are opposite to each other; the direct current control voltage is adjusted to change the direct current control current and control the magnetic saturation degree of the two magnetic valves, so that the ultra-wide range adjustment of the excitation inductance of the primary winding of the flexible transformer is realized.
3. A current-controlled magnetic valve flexible inductor according to claim 1, characterized in that: adding the one-stage solenoid valve of claim 1 to a two-stage solenoid valve, wherein the cross-sectional area of the second-stage solenoid valve is smaller than the cross-sectional area of the first-stage solenoid valve; the direct current control coil and the alternating current coil of the current control type magnetic valve type flexible inductor are the same as the direct current control coil and the alternating current coil of claim 1.
4. A current-controlled magnetic valve flexible inductor according to claim 1, characterized in that: changing the rectangular magnetic valve into a double-trapezoid magnetic valve; the direct current control coil and the alternating current coil of the flexible inductor are the same as the direct current control coil and the alternating current coil of claim 1.
5. A current-controlled magnetic valve flexible inductor according to claim 4, characterized in that: changing the double-trapezoid magnetic valve in claim 4 into a double-trapezoid + rectangular magnetic valve; the direct current control coil and the alternating current coil of the flexible inductor are the same as the direct current control coil and the alternating current coil of claim 1.
6. A current-controlled magnetic valve flexible inductor according to claim 1, characterized in that: changing the rectangular magnetic valve in claim 1 into a double quarter arc + rectangular magnetic valve; the direct current control coil and the alternating current coil of the flexible inductor are the same as the direct current control coil and the alternating current coil of claim 1.
7. A current-controlled magnetic valve flexible inductor according to claim 1, characterized in that: the positions of the side posts with the magnetic valves, where the two front faces of the "EE" shaped iron core are placed opposite, are interchanged with the positions of the center posts, where the two front faces are placed opposite.
8. A current-controlled magnetic valve flexible inductor according to claim 2, characterized in that: the positions of the side posts with the magnetic valves, where the two front faces of the "EE" shaped iron core are placed opposite, are interchanged with the positions of the center posts, where the two front faces are placed opposite.
9. A current-controlled magnetic valve flexible inductor according to claim 1, characterized in that: use of the current-controlled magnetic valve flexible inductor of claim 1 for an LLC resonant converter as a resonant inductance of said LLC resonant converter; the deviation between a given direct current voltage and a detected output direct current voltage in a control system of the LLC resonant converter is regulated through Proportional Integral (PI), direct current control voltage is obtained, direct current control current is obtained through a voltage control current source, the direct current control current is fed into two direct current control coils of the current control type magnetic valve type flexible inductor, the ultra-wide range regulation of the resonant inductance of the LLC resonant converter is realized, and therefore the ultra-wide variation range regulation of the input voltage, the output voltage and the load of the LLC resonant converter and the current sharing control of primary side resonant current and secondary side rectifying current of a transformer of the multi-path parallel LLC resonant converter are realized.
10. A current-controlled magnetic valve flexible inductor according to claim 2, characterized in that: use of the current-controlled magnetic valve type flexible transformer of claim 2 for an LLC resonant converter as a resonant transformer for said LLC resonant converter; the deviation between a given direct current voltage and a detected output direct current voltage in a control system of the LLC resonant converter is regulated through Proportional Integral (PI), so that direct current control voltage is obtained, direct current control current is obtained through a voltage control current source, and the direct current control current is fed into a direct current control coil of the resonant transformer, so that ultra-wide range regulation of a primary side excitation inductance value of the resonant transformer is realized, and the ultra-wide range regulation of input voltage, output voltage and load of the LLC resonant converter is realized.
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| CN202220876421.0U CN219626421U (en) | 2022-04-07 | 2022-04-07 | Current control type magnetic valve type flexible inductor, transformer and LLC resonant converter |
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| CN202220876421.0U CN219626421U (en) | 2022-04-07 | 2022-04-07 | Current control type magnetic valve type flexible inductor, transformer and LLC resonant converter |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |